Overall Cleanup an Fixes

[bartTC]

Includes or fixes:

• Use Github Actions for testing
• Add buffer and fileno for mocked sys.stdout #364
• Add support for Python 3.11 and 3.12 #359
• correct call on mock_file().write #350
• Add "svg-compressed" to create a simple classic QR Code with compressed file size. Allow execution from a development environment. #342
• Make pypng an extra dependency #338
• Linting with ruff #314
• Use typing_extensions only when needed #309
• Test improvements #316
• Remove some unnecessary compatibility code #313
• Fix/embedded and error correction #376

Fixes:

• qrcode fails tests with Pillow 10.3.0 #361
• ScriptTest::test_factory test failure (7.4.2) with "No such file" #355
• 7.4.2: pytest DeprecationWarning warnings #326
• Should raise exception if using embedded image with incorrect error correction? #363

[maribedran]

@bartTC I merged the missing PRs here and enabled coverage on tox. Can you take a look?